Name:
Date:
Solve each equation for the variable specified.
1)
12
p
+
7
q
=
3
r
for
q
2)
a
m
-
d
=
b
for
m
3)
b
x
-
c
=
d
for
x
4)
13
x
+
4
=
y
for
x
5)
3
x
y
+
2
z
=
10
for
y
6)
p
y
-
q
=
r
for
y
7)
6
p
(
8
-
11
q
)
=
5
r
for
q
8)
i
n
-
j
=
k
for
n
9)
8
z
+
9
x
=
8
y
for
x
10)
9
m
+
8
n
=
5
l
for
n
11)
18
m
+
7
=
n
for
m
12)
d
=
r
t
for
t
13)
3
p
+
7
q
=
7
r
for
p
14)
8
a
+
9
b
=
c
for
b
15)
m
z
-
n
=
p
for
z
16)
10
p
+
7
q
=
r
for
q
17)
2
x
+
5
y
=
2
z
for
x
18)
4
x
+
3
b
=
c
for
x
19)
(
a
+
2
c
)
+
4
=
g
for
a
20)
C
=
5
9
(
F
-
32
)
for
F
Answers:
1)
q
=
3
r
-
12
p
7
2)
m
=
b
+
d
a
3)
x
=
d
+
c
b
4)
x
=
y
-
4
13
5)
y
=
10
-
2
z
3
x
6)
y
=
r
+
q
p
7)
q
=
-5
r
66
p
+
8
11
8)
n
=
k
+
j
i
9)
x
=
8
y
-
8
z
9
10)
n
=
5
l
-
9
m
8
11)
m
=
n
-
7
18
12)
t
=
d
r
13)
p
=
7
r
-
7
q
3
14)
b
=
c
-
8
a
9
15)
z
=
p
+
n
m
16)
q
=
r
-
10
p
7
17)
x
=
2
z
-
5
y
2
18)
x
=
c
-
3
b
4
19)
a
=
g
-
(
4
+
2
c
)
20)
F
=
9
5
C
+
42